Reversing-valve for regenerative furnaces.



No 878,806. PATENTED FEB. 4, 1908. J. B. NAU.

REVERSING VALVE FOR RBGBNERATIVE FURNACES. APPLICATION FILED JULY 25, 1901s.

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UNITED JOHN B. Nnll, OF

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Nll lV-f YORK, N. i.

REVERSING-VALVE FOB REGENEEATIVE FURNACES.

Specification of Letters Patent.

Patented Feb. 4:, 1908.

ApnllUTLtloIi filed July 25.1906- Serial No. 327329.

of New York and State of New York, have lnvented new and useful lniprovenwuts m Reversingfl' alves for it egen era tive .l urna ces of Which the following is a. specification.

My invention relates to improvements i reversing valve systems on rcgeueraLive furnaces of the same style. hutnot, nceessarily of the sauna principle, as those illustrated in my U. S. Patents No. S 5l 2l or November 21, 1905, and No. M631 3, 1006.

The valves used in the *alve system lalent No. 805024, whether of the dev -go described in that very patent or whether of the design described in Patent No. R'Hfiiwlil, are such, that when the two valves reach the same level in their internunliate positions, lmth form simultaneous walewseals with their respective upper and lower valve seats, thereby ell'ect-ivelv interrupting any communication between any of the llucs landing in the valve casing, and preventing any loss ol gas. WVith all the advantages that such a systom presents, its use under normal eondi tions nevertheless has one great di advantage, viz.: it never permits, when it is desired for instance to cool oil the furnace, to put both ends of the latter simullanr-ously in direct communication with the smoke stack, Without'lirst placing the valves in their intermediate positions, and then emptying the lower seal of its water, to allow the hot gases to pass from the furnace to the smokestac k. This latter proceeding would natw- Ially expose the lower empty or part lv cnapl) water trough to the influence o'l' red-hot gases and cause their rapid dcsl rucl ion.

The present design has for its purpose, While maintaining intact or practically in--- tact the advantages of the lUillltl system, to provide means that will allow the valves to i e operated so, that at any moment the s can be shut oil and he kept shut oil tightly 011 one hand, while on the other hand, both ends of the furnace can be hit and kept in direct communication with ll 1e. smol-ie stack. In the drawings, Figure l. is a vertical cross-section of the valve. system; hi ll is a section on line. l d. of Fig. l: and l a plan View on line. ll--li of Fig. l. Similar letters rel'er to-simila r parts. The valve system is inelosed within .a

I.) of April metal casing 1, set directly over and surrounding lluo openings, of which 2 leads to the left-hand regenerator, 3 to the smoke (lnc, and 4- to the right-hand regenerator.

(using 1 is divided into three compartnu-nts, of which the two lower ones 5, forml ing the valve. chambers, are separated by a artil ion o in such a way, that. each chamber .1 will incloso one regcnerator and one smoke line opening. 'lhrough their top partition each chamhr-r 5 conununicales by means of an opening 7 with the third eompz'irtment,

l 1 l l the gas or air chamber Each opening 7 is located directly opposite one ol the smoke llue openings 3. (his chamber b is provided in its rool' or in any other convenient place with a gas inlet opening 57, and at its two ends with cleaning doors Opening E) may be controlled by a valve, ii' judged necessary.

llach valve chamber 5 is provided with a l'mersing val e in, that, in means ol' one or more hollow or solid spindles ll, can he moved up and down hetwcen its upper valve.- seat 12 and its lower valve-scat l3. The upper valve-scat l2, placed around and below opening 7, is made ol a hollow-wallml, watercooled shell. open at hoth ends, receiving cooling water through pipe 5"", and discharging it thumgh pipe 353; but this shell may not. he \valer-e mled. The lower water-seal is formed by a. water trough 13, surroumiliug smoke llue opening 3. The water troughs, surroumling smoke llue openings 3, may he one single water trough tor the two openings, stretching under partition (i from ono valva chamber to the other. in order to prevent the passage o'l gas from one chamher to the l other, l provide under partition (3 a llango 35 l reach ng to a certain depth into the water l below. So as to decrrn'lse the height of the valve system tl UOVt) the floor level, water trough 13 is laid below casing 1 in the brickl work in such a w v that its upper rim corresponds about with the lloor level.

.llm'ersiug valve ll), of a circular shape as shown on the drawings, or of any other suitahle one, is suizstantiall 'l'ormed oil' a parti- {ion 1 surrounded on its rim by a water trough l5, uormalltilled with n atcr or other liquid to the level oi the ovcrllmv 10. The vertical cross-soction oi the alve shows lcircular trough narrowing downwards and lerminatcal below hjv a circular llango 17, to i which is bolted a removable iron ring 18, l meant to receive the first impact oi the llamo,

independent of each other. hut i prefer to use thereby protecting; the valve proper against deterioration and possible cracking. This ring can easily be replaced, when worn out. The depth of water trough 15 and height of valve may be such, that when the valve is placed midway between its two seats, it will term simultaneous water-seals with both its upper and lower seats, or the valve may be too short to form in any position simultaneous water-seals with both of its In other respects the valve and its accessories, may be similar\ to the one described in my Patent No. 805024 of November 21, 1905 or similar to the one in U. S. Patent No. 816813 of April 3, 1906. I y

The top of each spindle 11 is screwed to a crosspiece '19, which by bolts 20 is fastened to another crosspiece 21, which latter receives each respectively one end of a cable or chain 22, running over awheel 23, mounted on and supported by standards 24, placed on the charging floor or in any other suitable place.

, To one side of this wheel is attached a toothed gear or rather a toothed sector 25, actioned on by means of pinion 26 and a hand wheel or a crank '27. This forms the operating and regulating device of the valve system. Any other suitable regulating and operating device may be used. Cooling and sealing water is supplied through pipes 28, discharging the water into funnels 2t) resting on top of crosspieces" 19, or otherwise conveniently fastened to upper ends of spindles 11. From the funnel the water runs through pipestems 11 to troughs 15 of the valves, and through overflows 16 is carried off through discharge pipes 30, shown in dotted lines, and falls into lower water trough 13, from where it is evacuated'to the outside through overflow 31.

It will be seen on the drawings, that when the two valves are placed at the same level in their intermediate positions, they form both water-seals with their upper valve-seats,but notwith their lower ones, thereby etlectively preventing gas from entering the furnace, and yet leaving below free communication between the regcncrator ilues and the smoke ilucs. With this arrangement of the valve system the two ends of the furnace can be, with the ordinary operation of the valves, put in communication with the smoke-stack, without in .any way emptying the lower water-seal ot its water and without admitting any gas to the valve. 'lhcroin the valve system dillcrs essentially from the one described in my previous patents, and makes it possible to obtain the following other gLeat advantages.

When starting the operations of the valves from their intermediate positions, one've lve.

will move upward the same amount that the other one will move downward. Of course when this latter valve has reached its lowest position, .a sufficient passage-will have been establishedrl etween itself and its 11 per valve-seat for the necessary amount 0 gas to enter the furnace. But meanwhile the other valve, being placed in its upper posi- ,admission to full admission of gas, and the excellent cond tion of draft that nevertheless vi ill exist at all times, makeit possible to regulatethe admission of gas to the fur nace with the valve itself, instead of doing it with a valve, controlling opening 9, as is done in all other systems known to me. llence, when using the valve system with gas, the regulating valve with all its accessories, controlling opening 9, can be omitted, thereby cheapening the valvesystcm and simplify ing its operation.

\Vhen using it with air, the whole gas chamber 8 with all its parts, such as gas inlet opening 9,cleaning doors 34, etc. can be omitted altogether. The, outside air will then enter directly through that opening 7, that, according to the position of the valves, is kept open, or it will be prevented from entering through anyof the openings 7, in case both valves are in their intermediate positions shown on the drawing. A similar arrangement could be obtained with the design illustrated in my Patent No. 805024 of November 21, 1005, although with that design the draft conditions, not being as favorable as in my present design, a regulating valve in opening 9' could hardly be omitted, without injury to the good running ol" the furnace.

All or only part of the partitions and walls of the casing may be water-coohal. Partition 6 may be solid or it may be hollow and water-cooled or it may be built 'of bricks, or the two valve chambers may be entirely independent of each other, each surrounded by its own partitions or walls.

I claim as my invention:

l. :ln-a reversing valve system, the combination of two valve chambers, each valve chamber having an upper valve-scat, a lower valve-scat, and a valve, the two valves being so connected together through their moving apparatus, that at one time one valve will make a seal with its upper seat only, while the other valve makes a' seal with its lower scat only, and at another time both valves will make simultanemisly seals with their upper seats, leaving a free passage below between each valve and its lower valve seat.

2. ln a reversing valve system, the combination of two valve chambers and one gas erases chamber, -each valve chamber havingan seat, a lower water-sealing valve seat, and

moving between its two seats,'a valve, too short to-make at one time water-seals with "both its upper and lower seats, the two valves beingso connected together through their moving apparatus, that at one time one valve will make a seal with its upper seat only, while the other valve makes a seal with its lower seat only, and at another time bothvalves will make simultaneously seals with their upper seats, leaving a free passage below-be tween each valve and its lower valve seat.

4. In a reversing valve system, the combination of two valve chambers and one gas chamber, each valve chamber having an upper w titer-sealing valve seat, a lower watersealing valve seat, and moving between its two seats, a valve, too short tomake at one time water-seals with both its upper and lower seats, the two valves being so connected as.

together througl'i their moving apparatus, that at one time one valve will make a seal with its upper seat only, while the other valve makes a seal with its lower scat only, and at another timeboth valves will make simultaneously seals with their upper seats,

leavin 'a tree )assa 'e below between each n 0 valve and its lower valve seat.

5. In a reversing vz-lv'esystem thejcombination of the two valves with their moving ap arat-us, each val\'e'b ing inclosed in a va ve chamber having an upper valve seat and a lower valve seat, and both valves being so connected together by said moving apparatus, that at one time one valve will malts a seal with its'upper seat only, while the other valve will make a seal with its lower seat only, and at another time, both valves can be made to make simultaneously seals with their upper seats, leaving h l'ree pas sage below between each valve and its lower seat, said moving apparatus being composed of the two valve stems and a cable connecting said stems and a wheel over which runs the cable and a toothed sectpnand a pinion acting on said sector and means to operate said pinion and to lace and maintain either one valvgwin any (esired intermediate position, the position of the other valve remaining dependent on the position of the first one. I

6. In a roversingvalve system'the eombination of two valves with their moving appa ratus, each valve being inelosed in a *alve chamber having an upper seat and a lower valve seat, and both valves being soconnected together by said n'ioving apparatus, that at one time one valve will make a seal with its upper seat only, while the other valve will make a seal with its lower seat only, and at another time, both valves can be made to make simultaneouslv seals with their upper seats, leaving a free passage below between each valve and its lower seat, said moving apparatus having means to place amL maintain stationary either one valve in any desired intermediate position, the position of the other valve remaining dependent on the position of the first one.

' .7 In a reversing valve system, the 00111 bination'of two valves with their movin apparatus, each Valve having 'a water-scaling trough, and being inelosed within the confines of one single valve chan'iber, said valve chamber having an upper valve seat and. a

lower water troughrvalve seat, the valve moving betweensaid two seats, said l'noving apparatus having means to place and maintain stationary either one valve in any desired position between its corresponding valve seats, the position of the other valve remaining dependent on the position of the iirst one. i I

8. In a reversing valve system, the combination of two valve chambers, each valve chamber having an upper watersealing valve seat, a lower water-sealing valve seat, and a valve, the two valves being so connected together through their moving apparatusthat at one time one valve will make a seal with its upper seat only, while the'other valve will make a seal with its lower seat only, and at another time; both valves will make simultaneously seals with their upper seats, leaving a free passage below between each valve and its lower valve seat, said two lower water-sealing valve seats having water communication with each other.

9. In a reversin valve system, thc combination of two valve chambers, each valvechamber having' an upper valve seat, a lower valve seat and a valve moving between the two seats, said valve. having a transverse par-- tition, a water trough around the rim of the partition with a cross section that gets narrower below and terminates into a vertical flange, an iron ring fastened arounc'l said flange, and an overflow on the water trough.

In testimony whereof, I have signed my name to this specification in theprcsence of two subscribing witnesses, this 24th day of July 1905.

JOHN B. NAU.

l/Vitnes' ANNIE D. WALLACE, ilannln'r D. Wrrsov 

